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# Copyright 2019, David Wilson
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors
# may be used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import, division, print_function
__metaclass__ = type
import logging
import os
import ansible.utils.display
import mitogen.core
import mitogen.utils
display = ansible.utils.display.Display()
#: The process name set via :func:`set_process_name`.
_process_name = None
#: The PID of the process that last called :func:`set_process_name`, so its
#: value can be ignored in unknown fork children.
_process_pid = None
def set_process_name(name):
"""
Set a name to adorn log messages with.
"""
global _process_name
_process_name = name
global _process_pid
_process_pid = os.getpid()
class Handler(logging.Handler):
"""
Use Mitogen's log format, but send the result to a Display method.
"""
def __init__(self, normal_method):
logging.Handler.__init__(self)
self.formatter = mitogen.utils.log_get_formatter()
self.normal_method = normal_method
#: Set of target loggers that produce warnings and errors that spam the
#: console needlessly. Their log level is forced to INFO. A better strategy
#: may simply be to bury all target logs in DEBUG output, but not by
#: overriding their log level as done here.
NOISY_LOGGERS = frozenset([
'dnf', # issue #272; warns when a package is already installed.
'boto', # issue #541; normal boto retry logic can cause ERROR logs.
])
def emit(self, record):
mitogen_name = getattr(record, 'mitogen_name', '')
if mitogen_name == 'stderr':
record.levelno = logging.ERROR
if mitogen_name in self.NOISY_LOGGERS and record.levelno >= logging.WARNING:
record.levelno = logging.DEBUG
if _process_pid == os.getpid():
process_name = _process_name
else:
process_name = '?'
s = '[%-4s %d] %s' % (process_name, os.getpid(), self.format(record))
if record.levelno >= logging.ERROR:
display.error(s, wrap_text=False)
elif record.levelno >= logging.WARNING:
display.warning(s, formatted=True)
else:
self.normal_method(s)
def setup():
"""
Install handlers for Mitogen loggers to redirect them into the Ansible
display framework. Ansible installs its own logging framework handlers when
C.DEFAULT_LOG_PATH is set, therefore disable propagation for our handlers.
"""
l_mitogen = logging.getLogger('mitogen')
l_mitogen_io = logging.getLogger('mitogen.io')
l_ansible_mitogen = logging.getLogger('ansible_mitogen')
l_operon = logging.getLogger('operon')
for logger in l_mitogen, l_mitogen_io, l_ansible_mitogen, l_operon:
logger.handlers = [Handler(display.vvv)]
logger.propagate = False
if display.verbosity > 2:
l_ansible_mitogen.setLevel(logging.DEBUG)
l_mitogen.setLevel(logging.DEBUG)
else:
# Mitogen copies the active log level into new children, allowing them
# to filter tiny messages before they hit the network, and therefore
# before they wake the IO loop. Explicitly setting INFO saves ~4%
# running against just the local machine.
l_mitogen.setLevel(logging.ERROR)
l_ansible_mitogen.setLevel(logging.ERROR)
if display.verbosity > 3:
l_mitogen_io.setLevel(logging.DEBUG)
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